Hi
I am debugging a video grabber cape board for BeagleBone Black and need to speed up the transfer of an image buffer in FIFO ( in the cape ) to a buffer in memory ( in BBB ) using EDMA through GPMC interface.
Currently I am doing this using ordinary memory read ( mmap ) from a user space application to a buffer ( YCrCb format ) that is converted to a PNG file. This is working fine, but is slow.
I am looking for a faster way to do such transfer and EDMA could be an option. But, there is the physical to virtual address translations issue and, really, I don't know how to handle this.
If someone have an example available, let me know, please.
Sergio
